diff --git a/include/mbedtls/pkcs12.h b/include/mbedtls/pkcs12.h
index a621ef5..69f0417 100644
--- a/include/mbedtls/pkcs12.h
+++ b/include/mbedtls/pkcs12.h
@@ -46,6 +46,8 @@
 extern "C" {
 #endif
 
+#if defined(MBEDTLS_ASN1_PARSE_C)
+
 /**
  * \brief            PKCS12 Password Based function (encryption / decryption)
  *                   for pbeWithSHAAnd128BitRC4
@@ -87,6 +89,8 @@
                 const unsigned char *input, size_t len,
                 unsigned char *output );
 
+#endif /* MBEDTLS_ASN1_PARSE_C */
+
 /**
  * \brief            The PKCS#12 derivation function uses a password and a salt
  *                   to produce pseudo-random bits for a particular "purpose".